The original concept of a dual superconducting solenoid spectrometer
is from J.P. Schapira, et al [1,2] at IPN-ORSAY.
The specific designs for TwinSol are based upon our group's experiences with using
superconducting solenoids to utilize and study secondary radioactive nuclear beams
[3,4,5,6,7]. The solenoid shown at the left (BIGSOL) [8] is a large ( 7 tesla, 40 cm
warm-bore ) magnet that is similar to the ones used in TwinSol. This particular magnet was
installed by our group at the National Superconducting
Cyclotron Laboratory. A smaller 3.5T solenoid (L'ilSol)
was used for many years at UND for RNB research.